Added missing files .gitignore
Merge branch '2.3'

* 2.3:
  [Validator] fixed ConstraintViolation:: incorrect when nested
  handle Optional and Required constraints from XML or YAML sources correctly
  added missing comments to WebTestCase
  Fixed #8455: PhpExecutableFinder::find() does not always return the correct binary
  Added missing files .gitignore
  [DependencyInjection] Fix Container::camelize to convert beginning and ending chars
  [Validator] Fixed groups argument misplace for validateValue method from validator class
  [Form] Fix of "PATCH'ed forms are never valid"
removed deps checks in unit tests

As Composer is now widely used in the PHP world, having to run composer
install before running the test suite is expected. This also has the
nice benefit of removing a bunch of code, making things easier to
maintain (there is only one place to declare a dev dependency), and
probably more.
[2.3][EventDispatcher] Make events lighter
merged branch drak/edaware2 (PR #7852)

This PR was squashed before being merged into the master branch (closes #7852).

Discussion
----------

[2.3][EventDispatcher] Make events lighter

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | yes
| Tests pass?   | yes
| Fixed tickets | na
| License       | MIT
| Doc PR        | symfony/symfony-docs#2476

I've taken the previous discussions and taking into consideration @fabpot does not want to break BC. This PR now provides the `EventDispatcher` as an argument to listeners. I've made a second separate commit which also passes the event name.

This PR is alternative to #7582

Commits
-------

e2bff32 [2.3][EventDispatcher] Make events lighter
[EventDispatcher] fixed some phpdoc
updated the composer install command to reflect changes in Composer
Merge branch '2.2' into 2.3

* 2.2:
  Fix some annotates
  [FrameworkBundle] made sure that the debug event dispatcher is used everywhere
  [HttpKernel] remove unneeded strtoupper
  updated the composer install command to reflect changes in Composer

Conflicts:
	src/Symfony/Component/Console/Application.php
	src/Symfony/Component/Console/Command/Command.php
	src/Symfony/Component/Console/Input/InputDefinition.php
	src/Symfony/Component/CssSelector/Node/CombinedSelectorNode.php
	src/Symfony/Component/Form/Form.php
	src/Symfony/Component/HttpKernel/Debug/ErrorHandler.php
	src/Symfony/Component/HttpKernel/DependencyInjection/RegisterListenersPass.php
	src/Symfony/Component/HttpKernel/Tests/DependencyInjection/RegisterListenersPassTest.php
	src/Symfony/Component/Locale/Locale.php
	src/Symfony/Component/Locale/README.md
	src/Symfony/Component/Locale/Stub/DateFormat/FullTransformer.php
Merge branch '2.3'

* 2.3:
  fixed phpdoc
  Fix some annotates
  [FrameworkBundle] made sure that the debug event dispatcher is used everywhere
  [HttpKernel] remove unneeded strtoupper
  updated the composer install command to reflect changes in Composer

Conflicts:
	src/Symfony/Component/Serializer/Encoder/XmlEncoder.php
fix typo : StdClass should be stdClass with little "s"
Merge branch '2.3'

* 2.3:
  Improve documentation of X-Forwarded-For header handling
  [DoctrineBridge] Loosened CollectionToArrayTransformer::transform() to accept arrays
  Removed unused use statements.
  Make usleep longer and simplify assertions
  Added japanese translation resource for security component.
  Replaced the @inheritdoc with an actual list of params since the original method has a different signature.
  fix typo : StdClass should be stdClass with little "s"
  Remove unnecessary continue from Request
  [Yaml] Fixed the escaping of strings starting with a dash when dumping
  Fix in ChainLoader.php
  fixed wrong started states
unify missing parentheses
unify and fix callable phpdoc throughout symfony
minor #9487 unify constructor initialization style throughout symfony (Tobion)

This PR was merged into the master branch.

Discussion
----------

unify constructor initialization style throughout symfony

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | n/a

In almost all classes symfony uses property initialization when the value is static. Constructor initialization is only used for things that actually have logic, like passed parameters or dynamic values. IMHO it makes the code much more readable because property definition, phpdoc and default value is in one place. Also one can easily see what the constructor implements for logic like overridden default value of a parent class. Otherwise the real deal is just hidden behind 10 property initializations. One more advantage is that it requires less code. As you can see, the code was almost cut in half (210 additions and 395 deletions).
I unified it accordingly across symfony. Sometimes it was [not even consistent within one class](https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Config/Definition/BaseNode.php#L32). At the same time I recognized some errors like missing parent constructor call, or undefined properties or private properties that are not even used.

I then realized that a few Kernel tests were not passing because they were deeply implementation specific like modifying booted flag with a custom `KernelForTest->setIsBooted();`. I improved and refactored the kernel tests in the __second commit__.

__Third commit__ unifies short ternary operator, e.g. `$foo ?: new Foo()`. __Forth commit__ unifies missing parentheses, e.g. `new Foo()`.

Commits
-------

077a089 unify missing parentheses
2888594 unify short ternary operator
2a9daff [HttpKernel] better written kernel tests
111ac18 unify constructor initialization style throughout symfony
updated version to 2.5
Teardown used wrong property
Merge branch '2.2' into 2.3

* 2.2:
  Teardown used wrong property
  Modified guessDefaultEscapingStrategy to not escape txt templates
  Fix DateType for 32bits computers.
  Fixed the registration of validation.xml file when the form is disabled
  When getting the session's id, check if the session is not closed
Merge branch '2.3' into 2.4

* 2.3:
  [Debug] fixed unit tests
  Avoid notice from being *eaten* by fatal error.
  Teardown used wrong property
  Modified guessDefaultEscapingStrategy to not escape txt templates
  Fix DateType for 32bits computers.
  Fixed the registration of validation.xml file when the form is disabled
  Fixes #9633, Removed dependency to Symfony\Bundle\FrameworkBundle\Tests\TestCase
  [Validator] Replaced inexistent interface.
  When getting the session's id, check if the session is not closed
  Adjusting CacheClear Warmup method to namespaced kernels

Conflicts:
	src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php
Merge branch '2.4'

* 2.4:
  [Debug] fixed unit tests
  Avoid notice from being *eaten* by fatal error.
  Teardown used wrong property
  Modified guessDefaultEscapingStrategy to not escape txt templates
  Fix DateType for 32bits computers.
  Fixed the registration of validation.xml file when the form is disabled
  fixed lexing expression ending with spaces
  Fixes #9633, Removed dependency to Symfony\Bundle\FrameworkBundle\Tests\TestCase
  [Validator] Replaced inexistent interface.
  [HttpKernel] Fix profiler event-listener usage outside request stack context
  When getting the session's id, check if the session is not closed
  Fix undefined offset when formatting namespace suggestions
  Adjusting CacheClear Warmup method to namespaced kernels
removed observer pattern, in favour of mediator